@media (min-width: 640px) {
  .cm-promo--2col {
    grid-column: span 2;
  }
}

@media (min-width: 1280px) {
  .cm-promo--2col {
    grid-column: 2 / span 2;
  }
}

.cm-promo--fullcol {
  grid-column: 1 / -1;
}